include error messages instead of error codes.
* enhancement: run-sbcl.sh is usefully handled by rlwrap. Thanks to William
Cushing. (lp#1249183)
+ * enhancement: new function SB-EXT:ASSERT-VERSION->= accepts a version
+ specification (multiple integer arguments) and signals a continuable error
+ if the current SBCL version is lower (older) than the specification.
+ (lp#674372)
* bug fix: EQUALP now compares correctly structures with raw slots larger
than a single word.
* bug fix: contribs couldn't be built on Windows with MinGW.